| Author |
Message |
| Perplexed_Rug |
I THINK I SHOULD TROUT MYSELF
(NAND GATE PUZZLE)
New here...so 'hi board'..
Right. Easy enough puzzle for an engineer although FORGOT to
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| do more than one iteration. once figuring out that I=111 O=T...duh
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Now also if
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| PERPLEXED = perplexed in the answers; using any case for this should be wrong because ASCII 'A' does not equal 'a' in binary...so binary for 'the' = 011101000110100001100101 and the binary for 'THE' = 010101000100100001000101 - so Mind Candy requires a box of trout
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 Posted: Sat Dec 09, 2006 8:58 am
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| brennagg |
nand
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| THE ANSWER IS ELEPHANT
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Excellent card....circuit not too hard to figure out but very clever finish involved!!
Posted: Mon Oct 23, 2006 4:59 am
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| Seej |
| jazzychad wrote: |
| How on earth do you construct a puzzle like that? It would take me a lifetime to make a puzzle work correctly like this one... I know Brian lurks around these boards.. any insight on how you did that?? |
You take a degree in electronics and pay attention to the digital logic/Boolean algebra/finite-state machine parts of the course. It's not that difficult once you know how (and a damn sight easier to get your head around than analogue electronics, what with complex numbers and Fourier transforms and the like....).
The silvers all seem to require some fairly specialised knowledge, so it's difficult to really know how tricky the ones I don't know about actually are, but this one's fairly straightforward - I've designed more complex circuits myself without any trouble.
Posted: Sun Jun 11, 2006 7:31 am
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| jazzychad |
Wow.. what an incredible puzzle. I finally received the card and sat down to solve it. It wasn't that hard to solve, but the real question is...
How on earth do you construct a puzzle like that? It would take me a lifetime to make a puzzle work correctly like this one... I know Brian lurks around these boards.. any insight on how you did that??
Posted: Sat Jun 10, 2006 11:55 am
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| kizandtango |
Heres the map
| Description |
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| Filesize |
143.66KB |
| Viewed |
116 Time(s) |
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Posted: Fri May 05, 2006 11:35 am
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| Ashin |
Just for completeness:
A NAND gate is essentially an AND-NOT gate conjunction. So:
| Code: |
Input1 Input2 OutputAND OutputNAND
0 0 0 1
0 1 0 1
1 0 0 1
1 1 1 0
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Even though there are 3 primary logic gates (AND, OR, NOT), the way you actually make these gates out of transistors is not as straight forward. Each one requires 2-3 electrical lines, where as the AND and NAND gates take only 1 line. However, you can build XOR, NXOR, OR, and NOR gates quite easily from NAND gates. So for this reason, the NAND gate is THE building block for the modern computer (and for this puzzle).
Posted: Thu Apr 27, 2006 2:34 pm
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| Grizy |
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When commenting on the confirmed answer please use spoilers.
They are provided so that we can all discuss a puzzle without spoiling it for those don't want to be given the answer.
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If you are stuck with a puzzle, don't understand how it was solved, want to find out, why not try logging in on the forum. That shows others that you are a "signed up member" and allows them to PM you with further info.
Grizy gets off soapbox
Posted: Sat Apr 22, 2006 9:59 am
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| nobody |
Elephants.
Computer circuits.
Hmm.
Suggests something to ME...
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| memory
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Don't have the card, so can't try it.
Posted: Sat Apr 22, 2006 1:24 am
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| cupragaz |
argh
i really cant work out this card its driving me mad now every search/link i look at for nand's just confuses me even more, can anyone help? cheers
Posted: Fri Apr 21, 2006 4:10 am
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| midnitegazer |
the picture is a close up of 2 capacitors sodered to a circuit board: i have no idea how this connects to elephants 
Posted: Thu Apr 20, 2006 3:33 pm
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| Emptynuke |
I think Elephant was a good start, furthermore though, what needs to be done, is we need to figure out what is in t he background, what it has to do with electircal circuits, and elephants. GOOD LUCK WITH THAT lol
Posted: Mon Apr 10, 2006 10:17 pm
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| SilentlyBroken |
*narrows eyes*
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| IT'S NOT A BLOODY ELEPHANT DAMMIT!!
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Posted: Mon Apr 10, 2006 1:01 pm
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| Uhtoff |
Lovely puzzle - first silver I've solved without help too 
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| Oh, and interestingly enough, initially I got the inputs for the 4th from bottom NAND wrong and it only mattered for the input 011, giving you elethant!
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Posted: Sat Apr 08, 2006 7:24 am
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| colin |
nothing to add, but when i saw who did the puzzle, just had to say that is _so_ brian
Posted: Sat Apr 08, 2006 7:24 am
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| Uhtoff |
Can I get someone to tell me what the inputs of the 4th from bottom NAND gate are, it's upper input isn't clear on the scan! Thanks.
Posted: Sat Apr 08, 2006 6:44 am
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